A Framework of Web-based Service System for Satellite Images Automatic Orthorectification

The orthorectification of satellite images is a foundational process in satellite applications. With the improvement of the satellite imaging technology and the orthorectification calculation models, the collection of Ground Control Point (GCP) is becoming the key factor restricting the efficiency and precision of orthorectification. At the same time, the services based on web in the geographic information filed have obtained substantial achievements, and the gradual maturity of GCP chips database construction technology, it is possible to provide remote sensing image ortho-rectification services via the internet based on the exiting GCP chips database. This paper proposed a framework design of Service Platform for satellite images automatic OrthoRectification(SPOR). Under B/S three tired (i.e. Data server, Web application server and Browser) system structure mode, this service platform translated noncorrected images form the user browser to the server side, corrected the images automatically under the assistance of GCPs image database and Digital Elevation Model(DEM), and sent the corrected images to users via the internet. The prototype test of the system shows that, the application of the SPOR can substantially improve the efficiency of satellite image orthorectification, save the labor of ortho-image demand users, and make the correction of the satellite images more professionally and automatically. ∗ Corresponding author.